公开(公告)号：US20230028785A1

公开(公告)日：2023-01-26

申请号：US17780392

申请日：2020-12-08

Applicant: KROSAKIHARIMA CORPORATION

Inventor： Kouhei TAKAMI ,  Katsumi MORIKAWA ,  Shigefumi MATSUMOTO

IPC: B22D41/54 ,  C04B35/106 ,  C04B38/00

Abstract: Provided is a refractory product which is not impregnated with pitch or the like, wherein it has higher corrosion-erosion resistance and thermal shock resistance as compared to a refractory product subjected to pitch or the like-impregnation treatment. The refractory product which is not impregnated with tar or pitch is characterized in that, in terms of values of physical properties of a sample of the refractory product as measured after heat-treating the sample in a non-oxidizing atmosphere at 1200° C.: an apparent porosity is 7% or less; a total void volume of pores having a pore diameter of 1 μm or less is 80% or more of an integrated void volume of pores of the entire sample of the refractory product; and a gas permeability is 50×10−17 m2 or less.